Astronomical units: We already go "big", but accurately modeling at a galactic scale redefines that notion...

C

EASY

Point Clouds: BRL-CAD has a basic point cloud primitive. Beef it up, make it faster, maybe integrate with the Point Cloud Library (PCL) for evaluation.

C/C++

MEDIUM

Annotations: Implement support for 2D annotations, labels that can be added to geometry.

Perl

EASY

<An Idea of Your Own>

Do you have an idea of your own? Maybe you need more ideas to inspire you? We're very open to areas of academic research, industry applications, and ideas that get you hooked on open source CAD development.